Number of walks from (0,0) to (n+3,n) which take steps from {E, N, NE}.
A190666
Number of walks from (0,0) to (n+3,n) which take steps from {E, N, NE}.
Terms
- a(0) =1a(1) =9a(2) =61a(3) =377a(4) =2241a(5) =13073a(6) =75517a(7) =433905a(8) =2485825a(9) =14218905a(10) =81270333a(11) =464387817a(12) =2653649025a(13) =15167050785a(14) =86716873725a(15) =495998874593
External references
- oeis: A190666